Oracle-L: Re: Hundreds of schemas in one instance?

From: <Jared.Still_at_radisys.com>
Date: Wed, 06 Mar 2002 14:48:28 -0800
Message-ID: <F001.00421636.20020306144828@fatcity.com>

Ben,

In addition to Dennis' comments, I would add that using a separate tablespace for
each user doesn't make much sense to me.

What is the perceived benefit of this?

Oracle will accomodate a large number of users and objects without putting each in their own tablespace. This seems like it would just create a lot of extra work for you.

An extreme number of database files can have an adverse affect on performance as well.

Jared

"Ben Poels" <poelsb_at_post.queensu.ca>
Sent by: root_at_fatcity.com
03/06/02 11:28 AM
Please respond to ORACLE-L

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        Subject:        Hundreds of schemas in one instance?

Our university wants to set up a server that will provide groups on campus with a standard set of services for web hosting, data collection or whatever they want to do. As much as possible each user should have their own isolated chunk of the server. An Oracle database will sit in the background to provide whatever database services they need. My thought is to go with one instance with a unique schema, including separate tablespaces/datafiles, for each user.

Some of the pros for this are:
- easy set up for new users

easy software upgrades
simplified tuning, backups, monitoring, auditing
user isolation, especially disk space usage
multiple instances would use far more memory

Some cons are:
- everyone must use the same release of the software

database down time affects everyone
might run into system maximums, for example max. number of datafiles
an enormous SYSTEM tablespace

Has anyone had to this kind of thing? Any comments or suggestions?

TIA, Ben

Ben Poels - Senior Technical Analyst - Queen's University at Kingston Phone: 613.533.2449 Fax: 613.533.2168 Email: poelsb_at_post.queensu.ca

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  INET: Jared.Still_at_radisys.com

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Received on Wed Mar 06 2002 - 16:48:28 CST